Fix lint errors

Author: tsudmi

src/staking_rewards/rewards.py

@@ -172,7 +172,9 @@ def process(self) -> None:
             f"Voting for new total rewards with parameters:"
             f" block number={next_sync_block_number}, epoch={epoch}"
         )
-        current_epoch: int = (int((int(time.time()) - self.genesis_timestamp) / self.seconds_per_epoch))
+        current_epoch: int = int(
+            (int(time.time()) - self.genesis_timestamp) / self.seconds_per_epoch
+        )
 
         if epoch < current_epoch - TOO_FAR_EPOCHS_SPAN:
             # Wait for next update round as the required epoch is too far behind